Claimed Legendary Task in mail and got no reward

What you were expecting to happen, and what actually happened?
Claimed a legendary task in mail and no reward given
What are the steps to make it happen again?
3 legendary tasks were sitting in mail, claimed all 3 and only received 6 rewards. Doesn’t look like they were combined in a way to get 9. 6 arcane shield, 2 arcane rage and mixture of keys (event gem glory)
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